24
Hook Backward Slope
CORRECT INCORRECT INCORRECT
SIDE PLATE ANGLE
DEPTH-GAUGE CLEARANCE
Depth-gauge Jointer
Sprocket in
Guide-bar Tip
Lubricating Hole
Flat File
0.025”(0.6mm)
Depth Gauge Clearance
GUIDE BAR MAINTENANCE
Reversing The Guide Bar
1. The depth gauge should be maintained at a
clearance of 0.025 in. (0.6 mm), as shown in Fig.
34. Use a depth gauge tool (available separately) to
check the depth gauge clearances.
2. Check the depth gauge clearance every time the
1. Remove the guide bar and chain from the chain
saw, following the section: “REPLACING THE BAR
AND CHAIN”.
2. Remove the chain from the guide bar and turn the
guide bar over (Fig. 37). The bottom of the bar will
be on the top.
3. Replace the chain on the bar.
4. Reassemble the guide bar and chain on the
chain saw and adjust the chain tension, following the
section: “REPLACING THE BAR AND CHAIN” and
“ADJUSTING THE CHAIN TENSION”.
-
able separately) to lower all gauges uniformly (Fig.
36). Depth-gauge jointers are available in 0.020 in.
to 0.035 in. (0.5 mm to 0.9 mm). Use a 0.025 in. (0.6
mm) depth-gauge jointer.
When the guide bar shows signs of wear, reverse it
on the saw to distribute the wear for maximum bar
life. The bar should be cleaned every day of use and
checked for wear and damage. Feathering or burring
of the bar rails is a normal process of bar wear. Such
occur. A bar with any of the following faults should be
replaced.
Wear inside the bar rails which permits the chain
to lay over sideways.
Bent guide bar.
Cracked or broken rails.
Spread rails.
In addition, the guide bar has a sprocket at its
tip. The sprocket must be lubricated weekly with
a grease syringe to extend the guide bar life. Use
a grease syringe to lubricate weekly with chain oil
by means of the lubricating hole (Fig. 36). Turn the
guide bar and check that the lubrication holes and
chain groove are free from impurities.
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